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If zero lies within the confidence interval of a coefficient estimate O The coefficient estimate is positive The coefficient estimate is negative O The regressor is insignificant The confidence level is not high enouglh

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If zero lies within the confidence interval of a coefficient estimate then we can say that the regressor is insignificant.

Note: In testing whether regressor is significant or not. If zero does not lies within the confidence interval then that regressor is significant and if lies then insignificant.

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